Multiple sucker-rod socket



March' -8 1927. 1,620,486

W, A. O'BVANNON MULTIPLE SUCKER ROD SOCKET Filed April 21. 1926 M Cir- Patented Mar. 8, 1927.

UNITED STATES WALTER A. OBANNON,

or TULsA, OKLAHOMA.

MULTIPLE scones-non socKn'r.

Application filed April 21,

The present invention relates to the art of fishing tools, and especially to that class.

known more generally as sucker rod sockets. These improvements have particular reference to the multiple ty e of implement designed to catch and pul broken sucker rods of various sizes from deep wells, and-the primary objects in vieware to provide a tool of this character embodying-simplicity of construction conducive to economy of manufacture, greater durability in use, and an arrangement of slip Wedges such that replacement may be readily made of those gripping elements subject to greatest wear and breakage with a resultant saving as against replacement of the whole. I

In sucker rod sockets'of the multiple type there is usually provided a plurality of slips or slip sections, one for use in catching rods which have been broken at the joint or enlarged portion, and another for use where the rod is broken between the joints. Such an arrangement is characteristic of the present invention. Each of these sections is split in a longitudinal direction into a plurality of segments the contraction of which upon the rod is produced by the taper formation of the barrel or bowl in which they are mounted. I do not herein claim such a construction broadly since it is the purpose of these improvements to provide means coacting with the sections and parts thereof such that while each section is capable of expanding and contracting freely and independently they are caused to move together as a unit in their upward and downward move ments and the parts thereof prevented from longitudinal movement with respect to each other. 7

Other objects and advantages of the in vention will be hereinafter set forth and the novel features thereof defined by the ap pended claims.

In the accompanying drawing:

Figure 1 is a vertical sectional view, through the lower portion of a sucker rod socket showing the preferred form of slip unit' Figure 2 is a transverse sectional view on the line 22 of Figure 1; and

Figures 3, i and 5 are fragmentary sectional views of slip units showing slightly modified forms of the connector piece employed to conjoin the sections of the slip unit.

Like reference characters designate cor- 1926. Serial No. 103,601.

responding parts throughout the several figures of the drawing.

Referring to the drawing, 1 designates the barrel ofthe sucker rod socket, the lower portion only of which is shown. As disclosed in Figure 1, the barrel tapers internally toward the bottom as indicated at 2, the entrance to said barrel preferably being beveled at 8 to facilitate the operation of finding.

Within the barrel is mounted the slip unit which is composed of what, for the purposes of this descripition, I term the lower or box section 4 and the upper or rod section 5. Exteriorly these sections are formed on a continuous uniform taper conforming to the taper of the barrel, and internally each is provided with a tapered bore, that of the box section being of greater diameter than the bore of the rod section. As a matter of practice the bores of the two sections are substantially continuous and are provided with the usual wickers 6 and 7 respectively. Furthermore, each of the sections is split longitudinally one or more times along the lines 8 so as to provide for expansion and contraction as the slip unit is moved upwardly and downwardly respectively in the tapered bore of the barrel. Obviously a slip construction of this type is advantageous because of the ability to use the same to catch rods of different diameters, but a feature which is particularly important from the manufacturing standpoint resides in the ability to heat treat the sections to much better advantage because of the substantial uniformity of their thicknesses. 'Heretoforc in devices of this character v owing to the taper of the external and internal walls, the u thickness of the metal at the top was so much greater than the thickness at the bottom that it was practically impossible to temper one section without over or under tempering the other; This is especially important in view of the fact that owing to the thinness of the box section and the tremendous strain imposed upon it in use, it must be tempered to the proper degree or frequent breakage will result. In the -majority of instances, this means discard of the complete slip unit but by virtue of the provision of separate slip sections any breakage or wear of one may be replaced without the loss of the other. Further than this, such an arrangement of separable sections in the slip unit enables the use of different sets of slips adapted for contracting movements of the parts.

varying makes of boxes As a matter of fact, 7 it is within, the purview ofthisinvention to replace the box section by one designed to catch a plain rod in which event the size of the Wickered bore is necessarily materially reduced.

I now pass to the feature of my present invention which is the particular subject matter of this application, namely the means employed for conjoining or connecting the box and rod. sections together so that they will move as a unit in alllongitudinal movements of the slip body while allowing for freedom of independent expanding and .In the preferred form of .Figure 1 this means consists of an annular member or ring 9 surroundingthe contiguousboi'esof thesections and having an upper flange .10 engaging inthe annular groove 11 in the rod section and a lower flange 12 seated in a corresponding annular groove 13 of the box section. It will be noticedthatby virtue of the disposition of this ring internally of the slip body, as shown in Figures 1,8 and I), it not only-acts to connect the two sections together vso as to cause them ,to .move together in the up and down travel of the slip unit and prevents the relative longitudinal movements of the parts of said sections, but .it acts also as a guide for directingthe rod toloe gripped intothe bore ofthe upper section. Likelihood of the end of the rod catching on the lower edge of the upper section isthereby precluded. The bore of the ring, it will be observed, is preferably formedon a taper so as to conform with the taper 0f the slip sections at the juncture of the same. As shown in Figures 3,41 and5 thisring connector may .take different forms, that depicted in the first named figure and 'designatedt) being substantially the same except .for the intermediate flange 9 which extends outwardly between the upper and lower sections. In Figure l the ring 9 is externally applied and ofU-shaped cross section, while the ring 9 of Figure 5 is S-shaped in cross section so that halfis internally disposed and half externally disposed. Any or all of these rings may be split to facilitate their application to the section.

:I-Iaving thus described my invention, what I claim as new is g 1. A slip unitfor sucker rod sockets composed of upper. and lower sections, and separate annular means surrounding the contiguous ends of the seetions'for connecting one to the other for vertical movement together but permitting relative independent movement laterally.

2. A slip unitfor sucker l'OCl sockets composed of separable sections, each section consisting of an independently operative set of gripping members, and a separate connector common to themembers of said sections for holding them in assembled position when in a socket while permitting relative free expansion or contraction movement.

8. A slip unit for sucker -od sockets COlnposed of superposed sections and annular means ,having tongue and groove connections with said sections.

4-. A slip uiiit .for sucker rod sockets composed of separable superposed se ctions, and a ring .meinber engaging aboutthe juncture of said sections, each of said sectionsbeing .forniedwi th a grooveto receive the ring.

5. A slip unit forjsncker rod sockets consist ng of a rod sect on and a .box section,

and a separate connector member for bridgingthe ad acent ends Qfthe two sections and constituting a guideassisting in passing an ob ect from onesection toflthe other while permitting free expansion or contraction of one sectionrelative to the other.

6. In a sucker IQtl s0cket,the combination of a barrel havinga tapered bore, a slip unit mounted in said bore and composed of a rod section andan independent box section and loosel fittinoflannular means dis- 7 a posed aboutthe uncture of the two sections for holding the same in contiguous relation, each of said sections being free .to independently expand and contract under the control of the tapered portion of the barrel.

7 A slip unit for sncker 'od sockets composed of separable sections, each section comprising an independently operative set of gripp ng members, I and a separate connectng means einbrac ngthe ad acent ends of said sections foi holdingtheinin assembled relat on when in a socket wh le perm tting relative free expansion or contractionmove- WALTER A. OBANNON. 

